Clean up #232

Job	Run time
build (ubuntu-latest, Debug, gcc, 0)	21s
build (ubuntu-latest, Debug, gcc, 2)	57s
build (ubuntu-latest, Debug, clang, 0)	10s
build (ubuntu-latest, Debug, clang, 2)	30s
build (ubuntu-latest, Release, gcc, 0)	36s
build (ubuntu-latest, Release, gcc, 2)	18s
build (ubuntu-latest, Release, clang, 0)	33s
build (ubuntu-latest, Release, clang, 2)	28s
build (macos-latest, Debug, gcc, 0)	19s
build (macos-latest, Debug, gcc, 2)	26s
build (macos-latest, Debug, clang, 0)	14s
build (macos-latest, Debug, clang, 2)	26s
build (macos-latest, Release, gcc, 0)	16s
build (macos-latest, Release, gcc, 2)	20s
build (macos-latest, Release, clang, 0)	16s
build (macos-latest, Release, clang, 2)	20s
build (windows-latest, Debug, cl, 0)	1m 16s
build (windows-latest, Debug, cl, 2)	58s
build (windows-latest, Release, cl, 0)	54s
build (windows-latest, Release, cl, 2)	1m 1s
	10m 39s

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